Dentifrice.



o to 1D."

WILLIAIE Ill. EUEERAUFEQ QF GHECAGCP, ILLINOIS.

nnuurnaton.

13o Drawing.

To all whom it may, concern;

Be it known that 1, 'WILLIAM M Rowe. RAUFF, a citizen of the United States, residing at Chico o, in the county of Cool: and State of Llinois, have invented certain new and useful "improvements in Bentiirices, of which the following is the speciiication.

My invention re a dentifrice and particularly to a dentifrice which, in addition to performing cleaning and polishing functions, actively counteracts dental caries and increases the resistance of the soft tissues of the mouth ction. I Dental caries (or tooth decay) is gen-- erally occasioned by acid forming bacteria harbored under mucin plaques which form Acids produced by these bacteria dissolve away the cementing substance in the interprismatic spaces between the enamel rods, which incases and supports these rods. The ends of the enamel rods, being thus exposed, easily break of? this process continues until the enamel has been penetrated, whereupon decomposition of the dentine pro Objects of my invention are: to counteract caries by providing an acid dentifrice, incapable oi attaching the teeth, but which owing to its acidity will stimu late normal salivary activityythus bringing about condition which promotes the health of the mouth, and to employ as an essential constituent said do ice a hard substance so compounded to be carried solution into the interprisinatic spaces in the enamel and other interstices the teeth and re precipitated by the action o? the ssliva so as to be actually deposited in the interprismatic and other interstices oi "he teeth and so solidify and harden the surface of the tooth, and combine therean abrasive agent to assist in breaking down and removal of the bacteria harboring plaques.

Another obyect of the invention is to" increase the vital resistance to infection of the soft tissues of the mouth by the application of a soluble calcium salt.

Other objects and advantacs of the invention will appear as the follow proceeds.

My invention in its preferred form icon specification of Letters Estonia.

rates to improvements in pen and tenaciously adhere to the teeth, I

escription to @atented May s, 191?,

Application filed @ctoher 2, low. Serial No. 123,212.

sists of tri-basic calcium phosphate, soluble monobasic calcium phosphate, and calcium chloridi It is made by the combination of tri-basic calcium phosphate (the substance of Which the teeth are composed) with an acid (for instance, hydrochloric). The calcium phosphate and acid combine, forming soluble mono-basic calcium phosphate and. calcium chlorid. The compound is preferably made with an excess of the tribasic calcium phosphate. This excess performs a plurality of tunctionsz-lt eliminatesythe possibility of deleterious action upon the teeth by the acid employed for the reason that such acid will have exhausted itself upon the tri-basic calcium phosphate in the dentifrice before it can act upon this same substance in the teeth; the excess of tri-basic calcium phosphate acts as an abrasive agent to assist in the destruction of in solution the mineral salts in the saliva which otherwise, and particularly Where an alkaline dentifrice is employed, may deposit upon and harden the mucin plaques. It also promotes the flow and the alkasaliva. This in itseli conduces L of the The alkaline saliva then neutralizes the soluble monobasic ca cium phosphate, which has penetrated to minute interprismatic and other interstices of the teeth, thereby converting this soluble mono-basic calcium phosphate into the insoluble tri-basic calciumphosphate, and causing the precipitation and deposit of said tri-basic calcium phosphate, the natural cementing substance of the teeth, in these spaces. The continual use of the dent frice solidifies and compacts the tooth surface by constant minute accretions the natural cementing substance of the teeth.

it is of course to be understood that other mineral salts which are capable of entering in solution in. an acid which will be neutralized with the resulting precipitation of ill , abrasive agents than the excess of tri-basic calcium phosphate abovespeciiied might be employed, the essential part ct my invention being to cause the {presence in the mouth of a liquid containing mineral salts in solution capable of penetrating the interprinnatic and other minute external spaces of the teeth and there being precipitated by the action or the saliva and deposited to solidify the tooth surface and counteract and repair its disintegration by continual minute accretions.

The use of my dentifrice is not only beneficial where theenamel still remains but also where the enamel has been, broken through, Where it will deposit in the dentinal tubuli the natural cementing substance of the tooth, solidifying and hardening the exposed surfaces, impregnating them with precipitated tri-basic calcium phosphate and rendering them insensitive and resistant to dental caries.

A dentifrice compounded according to my invention might be made up, for instance, as follows To 25 pounds of impalpable powdered tri-basic'calcium phosphate, add 1790 c. c. of distilled water with. 79 c. c. of hydrochloric acid. The substance so compounded will be an acid dentifrice inert to teeth, promoting by its acidity healthful conditions in the mouth and furthermore carrying calcium saltsin solution capable of permeeting the minutest inte rismatic and other spaces in the tooth surtace, and there being neutralized by the saliva, to deposit in 'minute quantities the natural cementing 'substance of the tooth and solidify, strengthen and harden its surface.

A valuable feature of my dentifrice re sides in its capacity to tone up the tissues of the mouth and increase their resistance to infection. Recent researches indicate that the calcium ion increases the vital resistance of the tissues, activates the leucocytes, increasing their hagccytic action to a marked .degree, and rther activates the agent which clots the blood. This clot is-natures means of preventing bleeding and of sealing a Wound to protect granulation tis-' .sue from infection. tionsof the calcium-. ion are made." directly available in my dentifrice because the calcium salts are made sbluble and brought These beneficial acmasses into intimate contact with all tissues in the 7 in the mouth (owing to the excess of tri- 7 basic calcium'phosphate) thus remedying the acid mouth condition responsible for 7 so much dental caries by direct neutralization as Well as by promoting the flow and alkalinity of the saliva.

While I have disclosed my invention as a dentifrice, I am aware of! various other beneficial uses thereof, particularly where it is desirable to bring a soluble calcium salt into iriitimate contact with bone or soft tissues. I

Having now described my invention,

1 claim:

1. A dentifrice comprising an acid salt inert to the tri-basic calcium phosphate oi the tooth structure, and capable of stimulating secretion of alkaline saliva and of reacting therewith to deposit tri-basic calcium phosphate in the interstices of the tooth. surface. 7

2. A dentifrice acid in reaction, containing a soluble acid salt inert to the calcium phosphate ot'the tooth structure and adapted to stimulate the how of saliva.

3. A calciiying dentifrice containing sub- 'stantially calcium salts entering into the composition of the toothheld in a vehicle in such condition as to be acted upon by the saliva, and to be converted there y and deposited on interstices of the tooth surface.

4. An acid'dentrifrice inert to the tooth structure, made by combining calcium phosphate in steam of the theoretical combining amount, with an acid, the excess calcium phosphate serving as a protective and abrasive agent. I a

5. A dentifrice comprising a soluble acid calcium salt inert to the structure or the teeth, ada ted to be carried. into intimate contact with the soft tissues in the mouth,

whereby the antiphlogistic and hemostatic properties of the calcium ion' areavailed of to prevent inflammation-and bleeding, and promote quick recovery of said tissues. I

In witness whereof, I hereunto subscribe my name to this specification in the pres ence of two witnesses. I

WILLIAM M. summers. Witnemes: c

Sumerian Hmrou, Mm'rnu J. MILLER.- 

